| /* |
| FUNCTION |
| <<fsetpos64>>---restore position of a large stream or file |
| |
| INDEX |
| fsetpos64 |
| INDEX |
| _fsetpos64_r |
| |
| ANSI_SYNOPSIS |
| #include <stdio.h> |
| int fsetpos64(FILE *<[fp]>, const _fpos64_t *<[pos]>); |
| int _fsetpos64_r(struct _reent *<[ptr]>, FILE *<[fp]>, |
| const _fpos64_t *<[pos]>); |
| |
| TRAD_SYNOPSIS |
| #include <stdio.h> |
| int fsetpos64(<[fp]>, <[pos]>) |
| FILE *<[fp]>; |
| _fpos64_t *<[pos]>; |
| |
| int _fsetpos64_r(<[ptr]>, <[fp]>, <[pos]>) |
| struct _reent *<[ptr]>; |
| FILE *<[fp]>; |
| _fpos64_t *<[pos]>; |
| |
| DESCRIPTION |
| Objects of type <<FILE>> can have a ``position'' that records how much |
| of the file your program has already read. Many of the <<stdio>> functions |
| depend on this position, and many change it as a side effect. |
| |
| You can use <<fsetpos64>> to return the large file identified by <[fp]> to a |
| previous position <<*<[pos]>>> (after first recording it with <<fgetpos64>>). |
| |
| See <<fseeko64>> for a similar facility. |
| |
| RETURNS |
| <<fgetpos64>> returns <<0>> when successful. If <<fgetpos64>> fails, the |
| result is <<1>>. The reason for failure is indicated in <<errno>>: |
| either <<ESPIPE>> (the stream identified by <[fp]> doesn't support |
| 64-bit repositioning) or <<EINVAL>> (invalid file position). |
| |
| PORTABILITY |
| <<fsetpos64>> is a glibc extension. |
| |
| Supporting OS subroutines required: <<close>>, <<fstat>>, <<isatty>>, |
| <<lseek64>>, <<read>>, <<sbrk>>, <<write>>. |
| */ |
| |
| #include <stdio.h> |
| |
| #ifdef __LARGE64_FILES |
| |
| int |
| _DEFUN (_fsetpos64_r, (ptr, iop, pos), |
| struct _reent *ptr _AND |
| FILE * iop _AND |
| _CONST _fpos64_t * pos) |
| { |
| int x = _fseeko64_r (ptr, iop, (_off64_t)(*pos), SEEK_SET); |
| |
| if (x != 0) |
| return 1; |
| return 0; |
| } |
| |
| #ifndef _REENT_ONLY |
| |
| int |
| _DEFUN (fsetpos64, (iop, pos), |
| FILE * iop _AND |
| _CONST _fpos64_t * pos) |
| { |
| return _fsetpos64_r (_REENT, iop, pos); |
| } |
| |
| #endif /* !_REENT_ONLY */ |
| |
| #endif /* __LARGE64_FILES */ |